It is better to grow long hair than to cut it.

Abu Is’ĥaaq said: Abu ‘Abdillaah (Aĥmad Ibn Ĥanbal) was asked concerning a man growing long hair, so he said: It is a Sunnah Ĥasanah, if we were able to do it then we’d have done so.

And he said: Nabi Sallallaahu ‘Alayhi Wa Sallam had Jummah.

Nine of the Companions of Nabi Sallallaahu ‘Alayhi Wa Sallam had long hair.

And he also said: Ten of them had Jummah.

And he said: It comes in a Ĥadeeth that the hair of Nabi Sallallaahu ‘Alayhi Wa Sallam reached his (Sallallaahu ‘Alayhi Wa Sallam) earlobes.

And in another Ĥadeeth: Until his (Sallallaahu ‘Alayhi Wa Sallam) shoulders.

And in a narration of Baraa Ibn ‘Aazib Radhiallaahu ‘Anhu he said: I did not see a person with long hair wearing red clothes more handsome than Rasoolullaah Sallallaahu ‘Alayhi Wa Sallam, his (Sallallaahu ‘Alayhi Wa Sallam) hair reached his (Sallallaahu ‘Alayhi Wa Sallam) shoulders. – Agreed upon by Bukhaari and Muslim.

Al-Khallaal said: I asked Aĥmad Ibn Yaĥyaa – i.e. Tha’laba – concerning Limmah, so he said: It is what reaches the ears.

And Jummah: It is what is longer than that.

And Baraa Ibn ‘Aazib Radhiallaahu ‘Anhu has mentioned in his Ĥadeeth that the hair of Nabi Sallallaahu ‘Alayhi Wa Sallam reached his (Sallallaahu ‘Alayhi Wa Sallam) shoulders, and he had called that Limmah.

It is Mustaĥabb (desirable) that the hair of a man should be like the hair of Nabi Sallallaahu ‘Alayhi Wa Sallam, that when it is long it should reach his shoulders, and when it is short it should reach his earlobes.

And if he lengthens his hair beyond that then there is no harm in it, Imaam Aĥmad had stated that and said: Abu ‘Ubaydah Radhiallaahu ‘Anhu had two plaits, and ‘Uthmaan Radhiallaahu ‘Anhu had two plaits.

Waa’il Ibn Ĥujr Radhiallaahu ‘Anhu said: I came to Rasoolullaah Sallallaahu ‘Alayhi Wa Sallam and I had long hair, then when he (Sallallaahu ‘Alayhi Wa Sallam) saw me he (Sallallaahu ‘Alayhi Wa Sallam) said: Evil, evil. Then I returned and cut it off, then I came to him (Sallallaahu ‘Alayhi Wa Sallam) the next day and he (Sallallaahu ‘Alayhi Wa Sallam) said: I did not mean you (by saying that), but this is better. – Reported by Ibn Maajah and Abu Dawud.

And it is Mustaĥabb to comb the hair and look after it, because of the Ĥadeeth of Abu Hurayrah Radhiallaahu ‘Anhu that Rasoolullaah Sallallaahu ‘Alayhi Wa Sallam said: Whoever has hair then let him honour it. (By washing and combing and oiling it) – Reported by Abu Dawud.